Substack MCP server
Give Claude, ChatGPT, Cursor or any MCP client live public Substack data. Add one URL, sign in, and ask in plain English: the assistant picks from 1 Substack endpoints, quotes the price and fetches the data.
https://api.insightsocial.app/mcp
Ask about Substack in plain English
“List the last 20 posts from this Substack and rank them by reactions: …substack.com”
Substack Posts API · 10–120 credits“Which free posts on this publication got the most comments this year?”
Substack Posts API · 10–120 credits“Get the full text of this Substack post as Markdown: …/p/…”
Substack Posts API · 10–120 credits
Connect it to your app
Pick the app you use for step-by-step setup.
Substack endpoints the assistant can call
All 1, with their price in credits.
Substack MCP: frequently asked questions
Yes. The hosted InsightSocial MCP server at https://api.insightsocial.app/mcp gives an AI assistant 1 Substack endpoints, read-only and public data only, alongside the other 24 platforms. Claude and ChatGPT connect by signing in; Cursor and other clients send an API key.
Posts. Each has a published price, and the assistant can quote it before calling.
Searching, describing and pricing endpoints are free. Fetching data costs the endpoint's price in credits, and your first 10 calls priced at 100 credits or less are free. A call that errors or finds nothing costs 0. The free plan includes monthly credits, with no card needed.
The tool that fetches data is marked as one that spends, so MCP clients ask before running it. The assistant can also quote the exact price of a call first, for free.
Instagram, TikTok, Facebook, LinkedIn, Twitter/X, YouTube, Reddit, Threads, Pinterest, Bluesky, Truth Social, Snapchat, Telegram, Twitch, Kick, Rumble, Kwai, Douyin, Xiaohongshu (RedNote), Quora, TikTok Shop, Weibo, Zhihu, Substack, Nextdoor: 303 endpoints for public profiles, posts, comments, followers, search, transcripts and ad libraries. Public data only; it never logs in as you on those platforms.
An app you connected by signing in gets its own key, listed under Connected apps on your API keys page: disconnect it there and it loses access straight away. A key you pasted into a config is revoked on the same page.
Other platforms
One MCP server covers all of them: 303 endpoints in total.